Innospec (IOSP) shares rallied 3.8% in the last trading session to close at $130.25. This move can be attributable to notable volume with a higher number of shares being traded than in a typical session. This compares to the stock's 1.4% gain over the past four weeks.IOSP’s rally appears to be driven by the optimism over the strong momentum in its Performance Chemicals segment, which is benefiting from strong volume growth. The company is also benefiting from the acquisition of QGP Quimica Geral in Brazil, ...